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Here's what MacRumors said: "The Intel Xeon E5 processor found in the Mac Pro is indeed removable, allowing for future upgrades. All...CPUs for the new Mac Pro use the same LGA 2011 socket standardized on the Mac Pro's motherboard."

As CNET Reviews noted in its initial review, the $2,999 base model Mac Pro gets you a quad-core 3.7GHz Intel Xeon processor, 12GB of RAM, a 256GB SSD, and AMD D300 FirePro graphics. Upgrades possible when you order a system include a six-core Xeon CPU and a 12-core processor.

"The new Mac Pro is a professional workhorse dressed up in a very appealing high-design package. It's a stretch to say this is a computer for casual consumers, but the starting price isn't more than you'd pay for a similarly configured Windows PC," said CNET Reviews.

Speaking of features, the teardown site OWC posted a photo earlier in the week showing the Mac Pro driving six 27-inch displays, according to MacRumors.